Grate-bar-shaking and clinker-crushing apparatus



G. G. MARX Dec. 24, 1929.

GRATE BAR SHAKING AND CLINKER CRUSHING APPARATUS Filed Nov. 14. 1927 M M M mo K M 7 L W M Q as Patented Dec. 24, 1929 UNITED STATES PATENT OFFICE GEORGE G. MARX, OF DETROIT, MICHIGAN Application filed November 14, 1927. Serial No. 233,152.

- This invention relates generally to grate structures and refers more particularly to a grate bar shaking and clinker crushing appa ratus.

The primary object of the invention is to provide a plurality of grate sections adapted to be pivotally rocned said sections being provided with means for effecting a jarring action between the several sections for loosening any ashes or clinkers which might have become lodged or wedged between the grate bars.

Another object is the provision of means for effecting a crushing operation between adjacent grate sections whereby clinkers of unusually large size are broken up into particles small enough to permit passage there of between the grate sections.

With these and other objects in view, the invention resides in certain novel features of construction, combinations and arrangements of parts as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Figure 1 is an end elevation of my improved construction showing the grate sections in their upright position.

Figure 2 is a view similar to that of Figure 1 showing the grate sections in one of their extreme positions of adjustment.

Figure 3 is a fragmentary plan View of the grate sections.

Figure l is a fragmentary perspective view of adjacent grate sections.

In the drawings wherein like characters of reference incicate like parts the numeral designates a grate comprising a plurality of horizontally arranged grate sections 11. These sections are suitably spaced and each one is provided with a pair of trunnions 12 projecting from he end portions thereof and which are journalled in the frame member 13.

While any particular type of grate may be employed 1 have in the present instance, provided grate sections of substantially rectangular formation, each section consisting of the longitudinal side bars 14 and the spaced cross bars 15. Preferably each cross bar, with the exception of the end bar, has its lower end rounded as clearly shown in F igure 4:.

The arrangement as thus far described permits the rocking of the grate sections about their pivots and in order to provide for the simultaneous movement of the sections each end cross bar is provided wi h a depending finger 16 to which is suitably pivoted a shaking rod 17. It will be apparent that the reciprocation of this rod will roclr'the grate sec tions about their pivots and permit a shaking action of the entire grate structure.

In grate structures previously used, it has been found that the ashes will become lodged between the cross bars and that clinkers of unusually large size will get caught between the grate sections and thereby greatly hamper the efficient operation of the grate. The present construction is designed to eliminate these objectionable features by first effecting a jaring action between the grate sections during the shaking operation, wiich will dislodge the ashes from the cross bars, and secondly providing for a crushing action between adjacent side bars 14.

Referring particularly to Figures 1 and 2 it will be noted hat the side bars 1 1- in effect constitute upper shoulders 18. Each end cross bar is also provided with corresponding shoulders 19 which are vertically spaced from the shoulders 18. The arrangement is such that upon the actuation of the rod 17 to the right, the lower right hand shoulder 19 of one section will engage the upper left hand shoulder 18 of its adjacent section and prevent any further movement in that direction. It will be noted that the end portions of these shoulders'are flat and upon the engagement of the shoulders 18 and 19 as shown in Figure 2, a jarring action will be effected which will be transmitted throughout all of the grate secions, so that any ashes which would have become caught between the cross bars under ordinary circumstances, will be dislodged be cause of this jarring action and thereby prevent any clogging of the ashes in the grate In the event that clinkers of large size are prevented from dropping between the grate sections when they are moved to the position shown in Figure 2, the arrangement is such that upon the reverse movement of the rod 17 the space between the adjacent upper shoulders will gradually lessen until the position indicated in Figure 1 is reached. During this movement any clinker lodged between adjacent sections will be crushed between the aforesaid shoulders and the resultant particles will readily fall between the grate sections. If any of the clinkers are not crushed upon the initial movement of the sections, the crushing operation will be repeated until they are completely broken up. It will be noted that upon the continued movement of the grate sections from the position of Figure 1 to that of Figure 2 there will also be a crushing action between each upper shoulder 18 and the rounded portion 20 of the adjacent grate bar. At the final movement of the sections, the force exerted between the shoulders 18 and the adjacent curved portion 20 will be relatively great and an efficient crushing operation will therefore take place upon this downward movement as well as upon the upward movement previously described. It is a of course evident that the operation just described will be repeated when the grate sections are moved to their other extreme position so that by a continued reciprocation of the rod 17 both sets of upper and lower shoulders of each grate section will come into play and perform both the jarring and crushing operation.

While in the present instance the end cross bars are shown as being provided with the upper and lower shoulders 18 and 19, it is of course apparent that any number of cross bars may be so constructed and that they may be positioned wherever desired according to the size and number of sections in the grate and the particular use to which the grate is to be subjected. It is furthermore apparent that the shaking bar 17 may be placed wherever desirable and that I have shown this bar as applied to the end of the grate merely for the purposes of illustration.

Referring particularly to Figure 4 it w1ll be noted that the top face of each cross bar 15 and side bar 14 is provided with a longitudinally extending groove or pocket 21 of dove tail formation, this pocket having a base portion 22 and downwardly and inwardly inclined side and end walls 23 and 24. These pockets are adapted to receive a quantity of ashes which will prevent slag from adhering to the central portions ofthe grate bars and thereby greatly increase the life of the grate sections. By having the pockets of dove tail formation the ashes will be prevented from falling out of the same during the shaking operation. Thus a protective filling of ashes is provided at all times. What little slag may come into, contact. with the edges of the cross side bars will be protected therefrom by the air passing through the grate sections. This air will tend to chill the. slag at these points and prevent the same from adhering to the edges of the cross and side bars. It will therefore be apparent that with the protection offered by the ash pockets and by the ventilation of the edge portions of the cross bars, the slag will practically be prevented from injuring the grate sections whereby the life of the grate will be materially increased.

It will also be noted that I have provided the side bars 14 with spaced projections 25, extending within the recesses 26, the object thereof being to bridge the space between adj acent side bars so that when a scraping tool is moved across the grate, there will be no possibility of this tool dropping between the grate sections. The arrangement is such that the projections are spaced far enough apart so as, not to interfere with the crushing operation of the grate sections and to further facilitate the efficient operation of the grate, each projection is positioned in line with the space between the cross bars 15.

From the foregoing it will be apparent that I have provided a novel grate construction in which means are provided to prevent the lodging of clinkers between the grate bars by effecting a jarring action between the bars, the arrangement being such that a crushing action is also effected between adjacent grate sections for taking care of clinkers which would ordinarily become jammed between these sections.

While it is believed that from the foregoing description, the nature and advantages of my invention will be readily apparent, I desire to have it understood that I do not limit myself to the specific construction herein shown and described and that such changes may be resorted to when desired as fall within the scope of what is claimed.

IVhat I claim as my invention is:

1. In a grate, a plurality of pivotally mounted grate sections, each section being provided with means adapted to contact with the means on its adjacent section for imparting a jarring action thereto.

2. In a grate, a plurality of pivotally mounted grate sections, each section being adapted to contact with its adjacent section for imparting a jarring action thereto, upon one movement of said sections, each section having a portion thereof movable toward a portion of its adjacent section upon the return movement of said section and cooperating therewith to impart a crushing action upon the material passing between said sections.

8. In a grate, a plurality of pivotally mounted grate sections having shoulders adapted to contact with each other upon movement of said sections whereby a jarring action will be imparted to. each section.

4. In a grate, a plurality of pivotally mounted grate sections, each section having spaced shoulers adapted to engage the shou ders of its adjacent sections for imparting a jarring action to said sections.

5. In a grate, a plurality of pivotally mounted grate sections, each section having spaced shoulders adapted to alternately engage the shoulders of its adjacent section for imparting a jarring action to said sections.

6. In a grate, a plurality of pivotally mounted grate sections, each section having vertically spaced upper and lower shoulders, means for operating said grate sections whereby the upper shoulder of one section will engage the lower shoulders of its adjacent section, for imparting a jarring action to said sections.

7. In a grate, a plurality of pivotally mounted grate sections, each section having vertically spaced upper and lower shoulders at each side thereof, means for operating said grate sections whereby the upper shoulder of one section will engage the lower shoulder of one of its adjacent sections, and the lower shoulder of said first mentioned section will engage the upper shoulder of its other adjacent section, for imparting a jarring action to said section.

In testimony whereof I aflix my signature.

GEORGE G. MARX. 

